Automobile shock absorber with air bag

Abstract

The automobile shock absorber comprises a cylinder barrel, the cylinder barrel comprises an inner cylinder barrel body and an outer cylinder barrel body, the outer cylinder barrel body is arranged outside the inner cylinder barrel body in a sleeved mode, the outer cylinder barrel body is connected with the air bag, a piston rod is movably arranged in the inner cylinder barrel body, the piston rod is provided with an extending end, the air bag wraps the extending end, and the piston rod is connected with a piston assembly. The piston assembly divides an inner cavity of the inner cylinder barrel into a rod cavity and a rodless cavity, the piston rod is provided with an oil through hole and an air through hole, an inner channel is arranged in the piston rod, an adjustable valve element and a valve port are arranged in the inner channel, the adjustable valve element divides the inner channel into a damping channel and an adjusting channel, one end of the damping channel is communicated with the rodless cavity, and the other end of the damping channel is communicated with the valve port. The other end of the damping channel is communicated with the oil through hole through the valve port, the adjusting channel is communicated with the air through hole, the adjustable valve element is provided with a conical part extending into the valve port, the size of a gap between the conical part and the valve port and the size of damping force are adjusted under the pressure difference effect of oil pressure and air pressure, operation is easy, and the adjusting speed is high.

Description

Technical Field

[0001] The utility model relates to the technical field of shock absorbers, in particular to an automobile shock absorber with an air bag. Background Art

[0002] The air suspension system plays a vital role in the vehicle's driving performance, comfort and safety. The air suspension system adjusts the distance between the vehicle body and the ground to achieve real-time adjustment of the vehicle's driving posture, allowing the vehicle to maintain good driving performance under different road conditions and load conditions. The shock absorber is a key component in the air suspension system, which is mainly responsible for attenuating the vibration of the vehicle body. During operation, the shock absorber controls the upward movement of the wheels and suspension by adjusting the flow of oil, thereby achieving the purpose of reducing the vibration of the vehicle body. The damping force of conventional shock absorbers is usually not adjustable. In order to meet the vibration reduction requirements of vehicles under different conditions, adjustable damping shock absorbers are also available on the market. For example, a split-type adjustable air chamber pressure multi-stage damping shock absorber disclosed in a Chinese patent application (publication number: CN201041213Y) is provided in the shock absorber body. A shock absorber working cylinder, a hollow piston rod and a valve core are provided. The valve core is nested in the hollow piston rod. The top end of the valve core is connected to the restoring resistance adjustment knob, and the other end of the valve core and the through hole in the hollow piston rod form an adjustable radial throttle hole; a compression needle valve, a bottom valve hole and a compression resistance adjustment knob are provided in the external bottom valve. The top end of the compression needle valve is connected to the compression resistance adjustment knob, and the other end of the compression needle valve and the bottom valve hole form an adjustable axial throttle hole. A floating piston and an air bag are installed at the bottom end of the external bottom valve. The restoring damping, compression damping and the airbag pressure in the inflation chamber can be adjusted according to the specific road conditions, personal driving habits and the use of the shock absorber.

[0003] However, the above-mentioned split-type adjustable air chamber pressure multi-stage damping shock absorber requires manual adjustment of the position of the compression needle valve and the valve core to adjust the damping force. In actual use, this may increase the complexity of the operation. It is difficult for the operator to accurately grasp the position of the compression needle valve and the valve core, which affects the vibration control effect of the shock absorber. In addition, the operation process requires a certain amount of time and effort and cannot meet the needs of rapid adjustment. Therefore, it is necessary to improve it. Utility Model Content

[0004] The purpose of the utility model is to provide a car shock absorber with an air bag in view of the defects and shortcomings of the prior art. The utility model has a simple and reasonable structure and is easy to operate. The adjustable valve core moves relative to the valve port under the pressure difference between the oil pressure in the rodless chamber and the air pressure inside the air bag, and automatically adjusts the size of the gap between the cone and the valve port, thereby adjusting the size of the damping force. The operation is simple and the adjustment speed is fast.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model discloses a car shock absorber with an air bag, comprising a cylinder, wherein the cylinder comprises an inner cylinder and an outer cylinder, the outer cylinder is sleeved on the outside of the inner cylinder, guides and bottom valve assemblies connected to the inner cylinder are arranged at both ends of the outer cylinder, the upper end of the outer cylinder is connected to the air bag, the lower end of the outer cylinder is fixedly connected to the bottom cover, a piston rod is movably arranged in the inner cylinder, the upper end of the piston rod passes through the guide and is provided with an extended end extending out of the cylinder, the air bag is covered on the outside of the extended end, the lower end of the piston rod is fixedly connected to the piston assembly, the piston assembly divides the inner cavity of the inner cylinder into a rod cavity and a rodless cavity, the piston rod is provided with an oil through hole connected to the rod cavity and an oil through hole connected to the air bag The inner cavity is connected to the air vent hole, and the piston rod is provided with an internal channel. An adjustable valve core is movably provided in the internal channel and a valve port matched with the adjustable valve core is provided. The adjustable valve core divides the internal channel into a damping channel and an adjusting channel. The lower end of the damping channel is connected to the rodless cavity, and the upper end of the damping channel is connected to the oil hole through the valve port. The adjusting channel is connected to the air vent hole. The adjustable valve core is sealed and matched with the adjusting channel. The lower end of the adjustable valve core is provided with a cone, which extends into the valve port. The adjustable valve core moves relative to the valve port under the pressure difference between the oil pressure of the rodless cavity and the air pressure inside the airbag to adjust the size of the gap between the cone and the valve port, thereby adjusting the size of the damping force.

[0007] Furthermore, an upper airbag seat and a lower airbag seat are fixedly provided at the upper and lower ends of the airbag, respectively. The lower airbag seat is cooperatively connected with the outer cylinder, and the upper airbag seat is cooperatively connected with the extended end.

[0008] Furthermore, the airbag lower seat is also provided with an inflation port communicated with the inner cavity of the airbag.

[0009] Furthermore, a guide seat is provided in the inner cylinder, and the guide seat sleeve is arranged on the outside of the piston rod.

[0010] Furthermore, a bushing is fixedly provided in the lower end of the internal channel, the bushing cooperates with the adjustable valve core, the damping channel is provided in the bushing, and the valve port is provided at the upper end of the damping channel.

[0011] Furthermore, the cone is arranged in a cone shape with a larger top and a smaller bottom. When the cone moves upward relative to the valve port, the gap between the cone and the valve port increases, and when the cone moves downward relative to the valve port, the gap between the cone and the valve port decreases.

[0012] Furthermore, the guide, the bottom valve assembly, the outer cylinder and the inner cylinder cooperate to form an oil storage chamber, the rod chamber is connected to the oil storage chamber through the guide, and the rodless chamber is connected to the oil storage chamber through the bottom valve assembly.

[0013] Furthermore, the guide comprises a guide body, a sealing cover is provided at the upper end of the guide body, the sealing cover is respectively sealed with the outer cylinder and the piston rod, a guide groove is provided between the guide body and the piston rod, and a plurality of guide holes are provided on the guide body.

[0014] Furthermore, the bottom valve assembly includes a mounting seat, a valve bonnet and a valve seat, the valve bonnet is arranged at the upper end of the mounting seat and cooperates with the mounting seat, the valve seat is movably arranged between the valve bonnet and the mounting seat, a return spring is arranged between the valve bonnet and the valve seat, a compensation valve is arranged between the valve seat and the mounting seat, a plurality of compensation holes cooperating with the compensation valve plate are arranged on the valve seat, and the valve bonnet is provided with through holes cooperating with the plurality of compensation holes.

[0015] Furthermore, the piston assembly includes a first gasket, an upper valve plate, a piston body, a lower valve plate and a second gasket which are arranged on the piston rod from top to bottom in sequence, and the piston body is provided with a first flow channel hole and a second flow channel hole which pass through the upper end surface and the lower end surface, the upper valve plate covers the first flow channel hole but does not cover the second flow channel hole, and the lower valve plate covers the second flow channel hole but does not cover the first flow channel hole.

[0016] The beneficial effects of the utility model are as follows: the automobile shock absorber with an air bag described in the utility model, the adjustable valve core moves relative to the valve port under the pressure difference between the oil pressure in the rodless chamber and the air pressure inside the air bag, and automatically adjusts the size of the gap between the cone and the valve port, thereby adjusting the size of the damping force, the operation is simple, and the adjustment speed is fast; the air pressure of the air bag is adjusted according to the road condition, when the road condition is good, the chassis is low, the piston rod load is small, and the gas pressure inside the air bag is small, when the oil pressure in the rodless chamber is greater than the gas pressure inside the air bag, the oil pressure pushes the adjustable valve core to move up, the gap between the cone and the valve port increases, thereby allowing more oil to pass through, and the damping force decreases accordingly, on the contrary, when the road condition is poor, the chassis rises, the piston rod load is large, and the gas pressure inside the air bag increases, when the air pressure inside the air bag is greater than the oil pressure in the rodless chamber, the air pressure inside the air bag pushes the adjustable valve core to move down, and the gap between the cone and the valve port decreases, The passage of oil is restricted, and the damping force increases accordingly; when the piston rod load is small and moves upward, the piston assembly is driven to move upward, and part of the oil in the rod chamber rushes open the lower valve plate through the second flow channel hole, so that the oil in the rod chamber enters the rodless chamber through the second flow channel hole. At the same time, part of the oil in the rod chamber also enters the oil storage chamber through the guide groove and the guide hole. When the oil flows through the piston assembly and the guide, a certain damping force will be formed, thereby playing a shock absorbing role; when the piston rod load is large and moves downward, the piston assembly is driven to move downward, and part of the oil in the rodless chamber rushes open the upper valve plate through the first flow channel hole, so that the oil in the rodless chamber enters the rod chamber through the first flow channel hole. At the same time, part of the oil in the rodless chamber also rushes open the compensation valve plate through the compensation hole, and then enters the oil storage chamber through the guide groove. When the oil flows through the piston assembly and the bottom valve assembly, a certain damping force will be formed, thereby playing a shock absorbing role. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;

[0018] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0019] Figure 3 yes Figure 1 A schematic diagram of the enlarged structure at B in the middle;

[0020] Figure 4 yes Figure 1 Schematic diagram of the enlarged structure at point C in the middle.

[0021] Figure 1-4In: 1. Outer cylinder; 2. Inner cylinder; 3. Guide; 4. Bottom valve assembly; 5. Airbag; 6. Bottom cover; 11. Oil storage chamber; 21. Rod chamber; 22. Rodless chamber; 7. Piston rod; 8. Piston assembly; 71. Adjustable valve core; 72. Adjustment channel; 73. Vent hole; 74. Damping channel; 75. Oil hole; 76. Bushing; 77. Guide seat; 78. Extended end; 79. Valve port; 51. Upper seat of airbag; 52. Lower seat of airbag; 521. Inflating port; 711. Sealing ring; 712 , cone; 781, plug; 31, guide body; 32, sealing cover; 33, oil seal; 311, guide groove; 312, guide hole; 81, first gasket; 82, upper valve plate; 83, piston body; 84, lower valve plate; 85, second gasket; 86, nut; 831, first flow channel hole; 832, second flow channel hole; 41, mounting seat; 42, valve cap; 43, valve seat; 44, return spring; 45, compensation valve plate; 46, guide groove; 431, compensation hole; 421, through hole. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings.

[0023] like Figure 1-4The automobile shock absorber with airbag shown in the figure comprises a cylinder, wherein the cylinder comprises an inner cylinder 2 and an outer cylinder 1, the outer cylinder 1 is sleeved on the outside of the inner cylinder 2, and guides 3 and bottom valve assemblies 4 connected to the inner cylinder 2 are arranged at both ends of the outer cylinder 1, an airbag 5 is connected to the upper end of the outer cylinder 1, and a bottom cover 6 is fixedly connected to the lower end of the outer cylinder 1, a piston rod 7 is movably arranged in the inner cylinder 2, the upper end of the piston rod 7 passes through the guide 3 and is provided with an extended end 78 extending out of the cylinder, the airbag 5 is covered on the outside of the extended end 78, and a plug 781 is provided at the upper end of the extended end 78, so as to provide a High sealing performance to prevent gas from leaking out from the upper end of the extended end 78; the lower end of the piston rod 7 is fixedly connected to the piston assembly 8, and the piston assembly 8 divides the inner cavity of the inner cylinder 2 into a rod cavity 21 and a rodless cavity 22. Preferably, in this embodiment, the guide 3, the bottom valve assembly 4, the outer cylinder 1 and the inner cylinder 2 cooperate to form an oil storage cavity 11, the rod cavity 21 is connected to the oil storage cavity 11 through the guide 3, and the rodless cavity 22 is connected to the oil storage cavity 11 through the bottom valve assembly 4. The oil storage cavity 11, the rod cavity 21 and the rodless cavity 22 are all filled with damping oil. The rod 7 is provided with an oil hole 75 connected to the rod cavity 21 and an air hole 73 connected to the inner cavity of the airbag 5. An internal channel is provided in the piston rod 7. An adjustable valve core 71 is movably provided in the internal channel and a valve port 79 matched with the adjustable valve core 71 is provided. The adjustable valve core 71 divides the internal channel into a damping channel 74 and an adjusting channel 72. The lower end of the damping channel 74 is connected to the rodless cavity 22, and the upper end of the damping channel 74 is connected to the oil hole 75 through the valve port 79. The adjusting channel 72 is connected to the air hole 73. The adjustable valve core 71 is sealed with the adjusting channel 72. Specifically, a sealing ring 711 is provided at the upper end of the adjustable valve core 71, and the sealing ring 711 is sealed with the inner wall of the adjusting channel 72. During the movement of the adjustable valve core 71, fluid leakage can be effectively prevented. A cone 712 is provided at the lower end of the adjustable valve core 71, and the cone 712 extends into the valve port 79. The adjustable valve core 71 moves relative to the valve port 79 under the action of the oil pressure of the rodless chamber 22 and the air pressure inside the airbag 5 to adjust the size of the gap between the cone 712 and the valve port 79, thereby adjusting the size of the damping force. The operation is simple and the adjustment speed is fast.

[0024] Preferably, in this embodiment, refer to Figure 3 The cone 712 is in a cone shape with a larger upper portion and a smaller lower portion. When the cone 712 moves upward relative to the valve port 79, the gap between the cone 712 and the valve port 79 increases, thereby allowing more oil to pass through, and the damping force decreases accordingly. When the cone 712 moves downward relative to the valve port 79, the gap between the cone 712 and the valve port 79 decreases, restricting the passage of oil, and the damping force increases accordingly.

[0025] Preferably, in the present embodiment, an airbag upper seat 51 and an airbag lower seat 52 are fixedly provided at the upper and lower ends of the airbag 5, respectively; the airbag lower seat 52 is cooperatively connected with the outer cylinder 1; the airbag upper seat 51 is cooperatively connected with the protruding end 78 so that the airbag 5 can maintain stability and reliability while bearing pressure; preferably, in the present embodiment, an inflation port 521 connected with the inner cavity of the airbag 5 is also provided on the airbag lower seat 52; the inflation port 521 is connected with an air source air pump to supply air to the inner cavity of the airbag 5.

[0026] Specifically, the air pressure of the airbag 5 is adjusted according to the road conditions. When the road conditions are good, the chassis is low and the gas pressure inside the airbag 5 is small. When the oil pressure in the rodless chamber 22 is greater than the gas pressure inside the airbag 5, the oil pressure pushes the adjustable valve core 71 upward, and the damping force decreases accordingly. Conversely, when the road conditions are poor, the chassis rises and the gas pressure inside the airbag 5 increases. When the air pressure inside the airbag 5 is greater than the oil pressure in the rodless chamber 22, the air pressure inside the airbag 5 pushes the adjustable valve core 71 downward, and the damping force increases accordingly.

[0027] Preferably, in this embodiment, a guide seat 77 is further provided in the inner cylinder 2, and the guide seat 77 is sleeved on the outside of the piston rod 7. The guide seat 77 can guide the piston rod 7 along a predetermined trajectory during movement, thereby reducing the deviation and jitter of the piston rod 7 during movement.

[0028] Preferably, in this embodiment, a bushing 76 is fixedly provided in the lower end of the internal passage, the bushing 76 cooperates with the adjustable valve core 71, the damping passage 74 is provided in the bushing 76, and the valve port 79 is provided at the upper end of the damping passage 74. The bushing 76 can limit the adjustable valve core 71 in the axial direction, preventing the adjustable valve core 71 from being separated and affecting the use.

[0029] Preferably, in this embodiment, refer to Figure 2 The guide 3 includes a guide body 31, and a sealing cover 32 is provided at the upper end of the guide body 31. The sealing cover 32 is respectively sealed with the outer cylinder 1 and the piston rod 7 to prevent oil leakage. Specifically, an oil seal 33 is also provided between the guide body 31 and the sealing cover 32 to prevent oil leakage from the gap between the guide body 31 and the sealing cover 32, thereby further improving the sealing performance. A guide groove 311 is provided between the guide body 31 and the piston rod 7, and a plurality of guide holes 312 are provided on the guide body 31. The guide groove 311 and the guide hole 312 can guide the oil in the rod cavity 21 into the oil storage cavity 11, thereby ensuring the smooth flow of the oil in the device, thereby ensuring the movement requirements of the piston rod 7, and realizing the recycling of the oil, thereby reducing energy consumption.

[0030] Preferably, in this embodiment, the bottom valve assembly 4 includes a mounting seat 41, a valve bonnet 42 and a valve seat 43. The valve bonnet 42 is arranged at the upper end of the mounting seat 41 and cooperates with the mounting seat 41. The valve seat 43 is movably arranged between the valve bonnet 42 and the mounting seat 41. A return spring 44 is arranged between the valve bonnet 42 and the valve seat 43 to play a resetting role. A compensation valve plate 45 is arranged between the valve seat 43 and the mounting seat 41. The valve seat 43 is provided with a plurality of valves that are in contact with the compensation valve plate. The valve cap 42 is provided with a through hole 421 which matches with a plurality of the compensation holes 431, and a guide groove 46 is formed between the mounting seat 41 and the oil storage chamber 11. When the piston rod 7 drives the piston assembly 8 to move downward, part of the oil in the rodless chamber 22 rushes open the compensation valve plate 45 through the compensation hole 431, and then enters the oil storage chamber 11 through the guide groove 46. When the oil flows through the bottom valve assembly 4, a certain damping force is formed, thereby playing a shock absorbing role.

[0031] Preferably, in this embodiment, refer to Figure 3 The piston assembly 8 includes a first gasket 81, an upper valve plate 82, a piston body 83, a lower valve plate 84 and a second gasket 85 which are arranged on the piston rod 7 from top to bottom in sequence. The piston body 83 is provided with a first flow channel hole 831 and a second flow channel hole 832 which pass through the upper end surface and the lower end surface. The upper valve plate 82 covers the first flow channel hole 831 but does not cover the second flow channel hole 832. The lower valve plate 84 covers the second flow channel hole 832 but does not cover the first flow channel hole 831. A nut 86 is also provided between the piston rod 7 and the second gasket 85 to improve the stability of the connection.

[0032] When the piston rod 7 moves up and down, the first flow channel hole 831 and the second flow channel hole 832 can guide the oil to flow between the rodless chamber 22 and the rod chamber 21. Specifically, when the piston rod 7 drives the piston assembly 8 to move downward, the oil in the rodless chamber 22 rushes open the upper valve plate 82 through the first flow channel hole 831, so that the oil in the rodless chamber 22 enters the rod chamber 21 through the first flow channel hole 831. When the piston rod 7 drives the piston assembly 8 to move upward, the oil in the rod chamber 21 rushes open the lower valve plate 84 through the second flow channel hole 832, so that the oil in the rod chamber 21 enters the rodless chamber 22 through the second flow channel hole 832. When the oil flows through the first flow channel hole 831 and the second flow channel hole 832, a certain damping force is formed, thereby playing a shock absorbing role.

[0033] The working principle of the utility model is as follows: the air pressure of the airbag 5 is adjusted according to the road condition. When the road condition is good, the chassis is low, the load on the piston rod 7 is small, and the gas pressure inside the airbag 5 is small. When the oil pressure in the rodless chamber 22 is greater than the gas pressure inside the airbag 5, the oil pressure pushes the adjustable valve core 71 to move upward, and the gap between the cone 712 and the valve port 79 increases, thereby allowing more oil to pass through, and the damping force decreases accordingly. On the contrary, when the road condition is poor, the chassis rises, the load on the piston rod 7 is large, and the gas pressure inside the airbag 5 increases. When the air pressure inside the airbag 5 is greater than the oil pressure in the rodless chamber 22, the air pressure inside the airbag 5 pushes the adjustable valve core 71 to move downward, and the gap between the cone 712 and the valve port 79 decreases, restricting the passage of oil, and the damping force increases accordingly; when the piston rod 7 moves upward with a small load, it drives the piston assembly 8 to move upward, and part of the oil in the rod chamber 21 rushes out through the second flow channel hole 832 to open the lower The valve plate 84 allows the oil in the rod chamber 21 to enter the rodless chamber 22 through the second flow channel hole 832. At the same time, part of the oil in the rod chamber 21 also enters the oil storage chamber 11 through the guide groove 311 and the guide hole 312. When the oil flows through the piston assembly 8 and the guide 3, a certain damping force will be formed, thereby playing a shock-absorbing role; when the piston rod 7 moves downward under a large load, it drives the piston assembly 8 to move downward, and part of the oil in the rodless chamber 22 rushes open the upper valve plate 82 through the first flow channel hole 831, so that the oil in the rodless chamber 22 enters the rod chamber 21 through the first flow channel hole 831. At the same time, part of the oil in the rodless chamber 22 also rushes open the compensation valve plate 45 through the compensation hole 431, and then enters the oil storage chamber 11 through the guide groove 46. When the oil flows through the piston assembly 8 and the bottom valve assembly 4, a certain damping force will be formed, thereby playing a shock-absorbing role.

[0034] The above description is only a preferred embodiment of the present utility model, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. An automobile shock absorber with an air bag, comprising a cylinder, characterized in that: The cylinder comprises an inner cylinder (2) and an outer cylinder (1), the outer cylinder (1) being sleeved on the outside of the inner cylinder (2), a guide (3) and a bottom valve assembly (4) connected to the inner cylinder (2) being provided at both ends of the outer cylinder (1), an air bag (5) being connected to the upper end of the outer cylinder (1), a bottom cover (6) being fixedly connected to the lower end of the outer cylinder (1), a piston rod (7) being movably provided in the inner cylinder (2), the upper end of the piston rod (7) passing through the guide (3) ) and is provided with an extended end (78) extending out of the cylinder barrel, the airbag (5) is covered on the outside of the extended end (78), the lower end of the piston rod (7) is fixedly connected to the piston assembly (8), the piston assembly (8) divides the inner cavity of the inner cylinder barrel (2) into a rod cavity (21) and a rodless cavity (22), the piston rod (7) is provided with an oil hole (75) connected to the rod cavity (21) and a vent hole (73) connected to the inner cavity of the airbag (5), and the piston rod (7) is provided with an oil hole (75) connected to the rod cavity (21) and a vent hole (73) connected to the inner cavity of the airbag (5). An internal passage is provided, in which an adjustable valve core (71) is movably provided and a valve port (79) is provided to cooperate with the adjustable valve core (71), wherein the adjustable valve core (71) divides the internal passage into a damping passage (74) and an adjusting passage (72), wherein the lower end of the damping passage (74) is connected to the rodless chamber (22), the upper end of the damping passage (74) is connected to the oil through hole (75) through the valve port (79), and the adjusting passage (72) is connected to the vent hole (75). 3) are connected, the adjustable valve core (71) is sealed and matched with the regulating channel (72), the lower end of the adjustable valve core (71) is provided with a cone (712), the cone (712) extends into the valve port (79), the adjustable valve core (71) is moved relative to the valve port (79) under the pressure difference between the oil pressure of the rodless chamber (22) and the air pressure inside the airbag (5), so as to adjust the gap between the cone (712) and the valve port (79), thereby adjusting the damping force.

2. The automobile shock absorber with airbag according to claim 1, characterized in that: An airbag upper seat (51) and an airbag lower seat (52) are fixedly provided at the upper and lower ends of the airbag (5), respectively. The airbag lower seat (52) is cooperatively connected to the outer cylinder (1), and the airbag upper seat (51) is cooperatively connected to the extended end (78).

3. The automobile shock absorber with airbag according to claim 2, characterized in that: The airbag lower seat (52) is also provided with an inflation port (521) which is in communication with the inner cavity of the airbag (5).

4. The automobile shock absorber with airbag according to claim 1, characterized in that: A guide seat (77) is also provided in the inner cylinder (2), and the guide seat (77) is sleeved on the outside of the piston rod (7).

5. The automobile shock absorber with airbag according to claim 1, characterized in that: A bushing (76) is fixedly provided in the lower end of the internal channel, the bushing (76) cooperates with the adjustable valve core (71), the damping channel (74) is provided in the bushing (76), and the valve port (79) is provided at the upper end of the damping channel (74).

6. The automobile shock absorber with airbag according to claim 5, characterized in that: The cone (712) is arranged in a cone shape with a larger top and a smaller bottom. When the cone (712) moves upward relative to the valve port (79), the gap between the cone (712) and the valve port (79) increases. When the cone (712) moves downward relative to the valve port (79), the gap between the cone (712) and the valve port (79) decreases.

7. The automobile shock absorber with airbag according to claim 1, characterized in that: The guide (3), the bottom valve assembly (4), the outer cylinder (1) and the inner cylinder (2) cooperate to form an oil storage chamber (11); the rod chamber (21) is connected to the oil storage chamber (11) through the guide (3); and the rodless chamber (22) is connected to the oil storage chamber (11) through the bottom valve assembly (4).

8. The automobile shock absorber with airbag according to claim 7, characterized in that: The guide (3) comprises a guide body (31), a sealing cover (32) is provided at the upper end of the guide body (31), the sealing cover (32) is respectively in sealing cooperation with the outer cylinder (1) and the piston rod (7), a guide groove (311) is provided between the guide body (31) and the piston rod (7), and a plurality of guide holes (312) are provided on the guide body (31).

9. The automobile shock absorber with airbag according to claim 7, characterized in that: The bottom valve assembly (4) comprises a mounting seat (41), a valve bonnet (42) and a valve seat (43); the valve bonnet (42) is arranged at the upper end of the mounting seat (41) and cooperates with the mounting seat (41); the valve seat (43) is movably arranged between the valve bonnet (42) and the mounting seat (41); a return spring (44) is arranged between the valve bonnet (42) and the valve seat (43); a compensation valve plate (45) is arranged between the valve seat (43) and the mounting seat (41); a plurality of compensation holes (431) cooperating with the compensation valve plate (45) are arranged on the valve seat (43); and a through hole (421) cooperating with the plurality of compensation holes (431) is arranged on the valve bonnet (42).

10. The automobile shock absorber with airbag according to claim 1, characterized in that: The piston assembly (8) comprises a first gasket (81), an upper valve plate (82), a piston body (83), a lower valve plate (84) and a second gasket (85) which are arranged on the piston rod (7) from top to bottom in sequence. The piston body (83) is provided with a first flow channel hole (831) and a second flow channel hole (832) which penetrate the upper end surface and the lower end surface. The upper valve plate (82) covers the first flow channel hole (831) but does not cover the second flow channel hole (832). The lower valve plate (84) covers the second flow channel hole (832) but does not cover the first flow channel hole (831).

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